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Condensed Matter Seminar: "Quantum Magnetism in LiZn2Mo3O8"
Numerous materials possess a geometrically frustrated arrangement of magnetic atoms; such materials have magnetic moments arranged on frustrated topologies such as triangular lattices, kagomé lattices, hyper-kagomé lattices, and edge sharing tetrahedra. A rich diversity of properties result depending on the magnitude of the per-site spin and orbital occupancies. Yet, the presence of local structural distortions , and a degree of site mixing between non-magnetic and magnetic layers are still key limiters in the quest for new quantum states of matter . In this talk, I will present recent physical property measurements on LiZn2Mo3O8, a material in which small clusters of 4d metal atoms replace individual magnetic ions, greatly limiting the degree of site mixing and suppressing first order Jahn-Teller distortions . In particular, 7Li NMR, µSR, ESR,  and inelastic neutron scattering experiments  are all consistent with the existence of valence bond pairs in LiZn2Mo3O8, with a spatial extent extending beyond nearest neighbors. Progress toward identifying their dynamic or static nature will be discussed.
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 J.P. Sheckelton, et al., Submitted (2013).
 M. Mourigal, et al., Submitted (2013).